Abstract: A surgical implant and method of surgically inserting the implant into the skull of a patient to gain access to cerebrospinal fluid within the lateral ventricles. The implant includes an annular housing defining thereon a flared base and a tubular member which projects outwardly from the housing. The implant is embedded in the skull such that the tubular member projects into a predefined opening in the skull and the base is positioned adjacent the outer surface of the skull. The implant is secured to the skull with adhesive which is applied to the base member. The implant defines an opening which extends therethrough, and serves a guide channel for directing a surgical instrument into the lateral ventricle.

Abstract: A simple, inexpensive construction, utilizing commonly available plastic ing, hypodermic needle hub, suture materials and cyanoacrylic glue is provided for subcutaneous implantation within a test animal, one of the generally tubular structure being permanently affixed in communication with a selected portion of the gastrointestinal tract consisting essentially of the small intestines, colon, stomach or gut-associated lymphoid tissue (GALT) of the test animal, with the other end of the tubular structrure firmly located behind the head of the test animal for easy access thereto. This invention, following implantation thereof into a test animal, may be readily utilized for the controlled delivery therethrough of multiple doses of one or more selected liquid materials for direct delivery thereof to the gastrointestinal tract of the test animal.